I can confirm that This cable https://www.songbirdfx.com/products/birdcord-pd15v/ and an Anker Battery with USB-C Power Delivery works fine.
I can happily sell the Omnicharge brick battery :) and velcro strap a small battery on the back of the Maschine, which acts as a stand too :D
It's way cleaner and safer than RipCord. The RipCord didn't provide enough Amps to M+ and I noticed issues because the CPU was underpowered.
Exciting times we live :D